ul {
    margin-left: 1.4rem;
}

li {
    line-height: 3rem;
}

li > span {
    cursor: pointer;
}

li i.material-icons {
    margin-right: 0.4rem;
    cursor: pointer;
    color: #999999;
    font-size: 1.6rem;
}

li > i.material-icons.rotate-90 {
    transform: rotate(90deg);
}

.doc-ul > li {
    line-height: 2.4rem;
    font-size: 1.4rem;
    position: relative;
    list-style: circle inside;
    border: 0.1rem solid #f4f4f4;
    padding-left: 1rem;
    border-radius: 0.2rem;
}

.doc-ul > li > a {
    color: #666;
}

.doc-ul > li > a:hover {
    color: #FF6600;
}

.doc-ul > li > p {
    color: #AAA;
    font-size: 1.2rem;
    line-height: 1.6rem;
    margin-bottom: 1rem;
    max-height: 3.2rem;
    display: -webkit-box;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    padding-left: 1.6rem;
}

.doc-ul > li > .position-right {
    position: absolute;
    right: 0;
}

.doc-ul > li .icon {
    opacity: 0;
    cursor: pointer;
}

.doc-ul > li:hover {
    border-color: #dddddd;
    background-color: white;
}

.doc-ul > li:hover .icon {
    opacity: 0.5;
}

.doc-ul > li .icon.on-top {
    color: green;
}
